Flue-stopper for fire doors and shutters.



F. L. SAINO.

Patented June 5, 1917.

STAES NT OFFTE.

FLUE-S'J.OITP]Z1R FOR FIRE DOORS AND SHUTTERS;

me ias.

Application filed July 27, 1916.

To all whom it may concern:

Be it known that l, FELIX L. SAINo, a citizen of the United States, residing at Memphis, Shelby county, and State of Tennessee, have invented and discovered certain new and useful Improvements in Flue stoppers for .F ire Doors and Shutters, of which the following is a specification.

T he present invention relates to fire-proof doors and shutters and consists in the combinations and arrangements of elements hereinafter described and particularly set forth in the accompanying claims.

With fire-proof doors and shutters constructed of adjacent sheet metal walls, there is the disadvantage that said walls form a flue between them, and, when subjected to the heat incident to the burning of a building, said walls separate and further increase the flue draft with disastrous results. And it is, therefore, the purpose of this invention to produce a door or shutter of the type in question embodying means that will prevent the formation of these fines.

The invention disclosed herein is directed to the specific form of detachable flue stopper disclosed in my co-pending application. for United States patent, bearing the Serial Number 30,833, and filed May 27 1915.

The invention is shown by way of illustration in the accompanying drawings, wherein Figure 1 is a fragmentary central sectional view of a door or shutter illustrating the application of the flue stopper, and

Fig. 2 a detailed perspective view thereof.

Referring to the construction in detail, and wherein like reference characters indicate corresponding parts in the different views, 1 and 3 designate respectively the front and rear walls of a fire-proof door or shutter that are constructed preferably of corrugated sheet metal, and 2 is an intermediate sheet of refractorysubstance, such as asbestos or the like. Said walls and the asbestos sheet of the shutter or door comprise a single unit that is contained within and reinforced by a suitable frame, as fully set forth in my co-pending application for United States patent, bearing the Serial Number 32,948, and filed June 8, 1915.

The walls 1 and 3 are secured together by suitable fastenings which include fusible elements that operate to release such fasten- Specification of Letters Patent.

running lengthwise of the door.

Patented June 5, 1917.

Serial No. 111,628.

ings and permit said walls, or the shutter as a unit, to expand and effectively close the door or window opening, as clearly set forth in my application above identified.

'The wall 1 has the corrugations thereof arranged vertically and this, with the adjacent wall 2, forms a series of openings 3 These openings produce a flue, and when the fastening devices are released, the walls 1 and 3 will tend to separate and greatly increase the flue effect, with the result thata considverable draft will be created conducive to the spreading or intensity of the flame, and, to avoid this condition, it is proposed to provide a fiue stopper along the upper and lower edges of the door or shutter.

- The said stopperconsists of a strip 4: bent at 5 and folded upon itself as at 6, and the portion 6 has formed continuous therewith a tongue or flange 7 that enters within the groove or channel 8 constructed by bending the lower edge of the sheet 3 at 9, and then folding such bended portion upon itself,

forming the terminal flange 10 that is disposed against the asbestossheet 2, as shown in Fig. 1. A plurality of 'bolts 11 pass through the flange 7 along the lower edge and, in like manner, through the asbestos sheet and rear wall 1 of the door or shutter; and said bolts are secured by the nuts 12 against the surface of the wall 1 on the inner side.

It will be evident from the foregoing that, while the walls 1 and 8 may be allowed to separate, all tendency to produce a flue therebetween is destroyed, and that the flue stoppers will providesuitable abutments for hearing against the window or door frame when the door or shutter has expanded.

It is obvious that those skilled in the art may vary the details of construction and arrangement of parts without departing from the spirit of the invention, and therefore I do not wish to be limited to such features except as may be required by the claims.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. The combination with a fire-proof door or shutter comprising adjacent walls forming a flue therebetween, of a plate detachably secured along an edge of one of said walls, said plate disposed laterally to one walls forming a flue and the lower edge of one of said wallsconstructed to provide a.

- channel, of a plate disposed transversely of said walls along the edge providing a flue stopper, said platehaving a flange fitting, within the'channel of said wall, and means fox-securing said flange to the door or shutter, substantially as set forth.

3. The combination with a fireproof door or shutter comprising adjacent sheet metal walls forming a flue therebetween, the lower edge of one of said walls being folded upon itself to provide a channel, of aplate disposed transversely along the edge of said walls and providing a flue stopper, said plate being folded upon itself and formed with an upwardly projecting flange fitting within said channel, and a plurality of bolts passing'through said flange and one wall of the door or shutter, substantially as set forth.

a. The combination with a fire-proof door or shutter comprising adjacent sheet metal walls arranged to form a flue between them, and the lower edge of one of said walls folded upon itself to provide a channel, of a draft stopper consisting of a plate folded upon itself and formed with an upwardly projecting flange fitting within said channel, said plate extending in one direction to cover the space between the two walls of the door and in the other direction to cover the space between the door and the, adjacent wall of the building, and bolts securing said flange to a wall of the door or shutter, sub stantially as set forth.

In witness whereof, I have hereunto set my hand and seal at Memphis, Tennessee,

this lth day of July, A. D. nineteen hundred and sixteen. V

FELIX L. SAINO. [n s] Witnesses:

JOHN W. 'FARLEY, P. P. H. MANGUM.'

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

